The HT12D decoder is a CMOS LSI for remote control system applications. It will interface to RF receiver modules to create a secure single or multiple channel RF remote control receiver. The decoder receives serial addresses and data from a programmed encoder that are transmitted by a carrier using an RF or an IR transmission medium. The decoder compares the serial input data three times continuously with its local addresses. If no error or unmatched codes are found, the input data codes are decoded and then transferred to the output pins. The VT pin also goes high to indicate a valid transmission. The HT12D decoder is capable of decoding informations that consist of N bits of address and 12-N bits of data. The HT12D is arranged to provide 8 address bits and 4 data bits.
Features Operating voltage: 2.4V~12V Low power and high noise immunity CMOS technology Low standby current Capable of decoding 12 bits of information Binary address setting Received codes are checked 3 times Address/Data number combination: 8 address bits and 4 data bits Built-in oscillator needs only 5% resistor Valid transmission indicator Easy interface with an RF or an infrared transmission medium Minimal external components Secure and robust protocol Ideal for remote control and security applications Compatible with the HT12E encoder IC 18-pin DIP Applications Burglar alarm system Smoke and fire alarm system Garage door controllers Car door controllers Car alarm system Security system Cordless telephones
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